{"id":"CVE-2026-40856","title":"WNC T-Mobile 5G Box IDU router is vulnerable to improper access control","summary":"WNC T-Mobile 5G Box IDU router is vulnerable to improper access control. The vulnerability exists in the wnc_maccheck.cgi endpoint, which is accessible without authentication. It allows a remote attacker to retrieve sensitive configurati…","severity":"high","cvss":7.1,"cvssVector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-306"],"vendor":"WNC","product":"T-Mobile 5G Box IDU","affected":["t-mobile_5g_box_idu < 1.1.0.651412"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:14:25.980","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40856","references":[{"url":"https://cert.pl/posts/2026/09/CVE-2026-40854","label":"cvd@cert.pl"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-16T16:01:03.097066Z"},"cvssSource":"cna","ingestedAt":"2026-09-16T11:54:38.960Z","epss":0.00373,"epssPercentile":0.28409,"slug":"CVE-2026-40856","body":"## Overview\n\nWNC T-Mobile 5G Box IDU router is vulnerable to improper access control. The vulnerability exists in the wnc_maccheck.cgi endpoint, which is accessible without authentication. It allows a remote attacker to retrieve sensitive configuration data, including the administrator web password, WiFi passphrase, and technical device information.This issue has been fixed in firmware version 1.1.0.651412\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}